JP3458917B2 - Motor structure - Google Patents
Motor structureInfo
- Publication number
- JP3458917B2 JP3458917B2 JP17008195A JP17008195A JP3458917B2 JP 3458917 B2 JP3458917 B2 JP 3458917B2 JP 17008195 A JP17008195 A JP 17008195A JP 17008195 A JP17008195 A JP 17008195A JP 3458917 B2 JP3458917 B2 JP 3458917B2
- Authority
- JP
- Japan
- Prior art keywords
- pole
- pole teeth
- motor
- stator
- motor structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000758 substrate Substances 0.000 claims description 20
- 239000000696 magnetic material Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 238000004804 winding Methods 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
- H02K5/1675—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotary shaft at only one end of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/09—Structural association with bearings with magnetic bearings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Brushless Motors (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ラジアルギャップ
のモータにおいてエアギャップ磁束（密度）の調整並び
にロータマグネットとステータ鉄芯との間にアキシャル
方向に働く磁気的力を容易に調整することができる構造
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can easily adjust the air gap magnetic flux (density) in a radial gap motor and the magnetic force acting in the axial direction between a rotor magnet and a stator iron core. It is about structure.
【０００２】[0002]
【従来の技術】ラジアルギャップモータで特にアウター
ロータ型のものにおいてはロータマグネットのボリュー
ムが大きくなりステータヨーク（ステータの突極部）と
マグネットの対向面積が大きくなることより、一般的に
低速／高トルクが要求される用途に向いている。例えば
ダイレクト駆動タイプのフロッピーデイスクドライバー
（以下、ＦＤＤという）のスピンドルモータはほとんど
がこの構成である。2. Description of the Related Art In radial gap motors, particularly those of the outer rotor type, the volume of the rotor magnet is large and the facing area between the stator yoke (the salient pole portion of the stator) and the magnet is large, so that generally low speed / high Suitable for applications where torque is required. For example, most of the direct drive type floppy disk driver (hereinafter referred to as FDD) spindle motors have this configuration.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、マグネ
ットボリュームが大きく、ステータヨークとの対向面積
が大きいことから以下の問題があった。
（１）コギングトルク／トルクリップルが大きくなり、
速度コントロールした際、回転ムラが悪化する。従っ
て、エアギャップ磁束（密度）分布を何らかの手法を用
いて調整しコギングトルクを小さくする必要がある。
（２）ロータマグネットとステータヨークのアキシャル
方向の磁気的バランスがとれていないと（軸受構造から
アキシャル方向に吸引力がかかる構造が一般的）当該ロ
ータマグネットとステータヨークの間に常時磁気的吸引
力が作用し、この力が軸受部に加わることになるが、２
ケのボールベアリングを使用した軸受構成では、当該力
はそれ程問題にはならないが、軸受コストが上がる欠点
がある。一方摺動タイプの軸受構造では、軸受部と回転
軸の間に数ミクロン程度のラジアルクリアランスが必要
でありこのクリアランスによりロータとステータの磁気
的アンバランスにより回転中のロータ軸振れが増大（悪
化）し、回転精度を低下させることとなる。However, since the magnet volume is large and the area facing the stator yoke is large, there are the following problems. (1) Cogging torque / torque ripple increases,
Rotational unevenness becomes worse when the speed is controlled. Therefore, it is necessary to reduce the cogging torque by adjusting the air gap magnetic flux (density) distribution using some method. (2) If the rotor magnet and the stator yoke are not magnetically balanced in the axial direction (generally, a structure in which an attractive force is applied in the axial direction from the bearing structure), there is always a magnetic attractive force between the rotor magnet and the stator yoke. Will act and this force will be applied to the bearing part.
In a bearing structure using a double ball bearing, the force is not so problematic, but there is a drawback that the bearing cost increases. On the other hand, in the sliding type bearing structure, a radial clearance of about several microns is required between the bearing and the rotating shaft, and this clearance increases the rotor shaft run-out during rotation due to magnetic imbalance between the rotor and stator (deterioration). However, the rotation accuracy is reduced.
【０００４】[0004]
【課題を解決するための手段】上述の如き従来の不都合
を解消するため、本願の請求項１に記載の発明は、基板
上に設けたラジアルギャップ型モータにおいて、固定子
磁極と固定子磁極との間であって、回転磁極に近接して
モータを取り付ける基板と接続した軟磁性材で構成され
た極歯を円周方向に不均一に設け、前記回転磁極の回転
軸を一定方向に傾けたことを特徴とするモータ構造を提
供する。本願の請求項２に記載の発明は、請求項１に記
載の発明に加えて、前記極歯はモータを取り付ける基板
である軟磁性の金属板を切り起こして形成したものであ
ることを特徴とするモータ構造を提供する。本願の請求
項３に記載の発明は、請求項２に記載の発明に加えて、
前記極歯は回転軸から放射方向に向かって切り起こされ
ていることを特徴とするモータ構造を提供する。In order to solve the above-mentioned conventional inconveniences, the invention according to claim 1 of the present application is a radial gap type motor provided on a substrate, wherein a stator pole and a stator pole are provided. Between the rotating magnetic poles, the pole teeth made of a soft magnetic material connected to the substrate on which the motor is mounted are provided non-uniformly in the circumferential direction to rotate the rotating magnetic poles.
Provided is a motor structure having a shaft tilted in a certain direction . The invention according to claim 2 of the present application is characterized in that, in addition to the invention according to claim 1, the pole teeth are formed by cutting and raising a soft magnetic metal plate which is a substrate for mounting a motor. A motor structure is provided. The invention described in claim 3 of the present application, in addition to the invention described in claim 2,
There is provided a motor structure, wherein the pole teeth are cut and raised from a rotation axis in a radial direction.
【０００５】本願の請求項４に記載の発明は、請求項２
に記載の発明に加えて、前記極歯はロータの回転磁極方
向から回転軸方向に切り起こされていることを特徴とす
るモータ構造を提供する。本願の請求項５に記載の発明
は、請求項１に記載の発明に加えて、前記極歯は、固定
子磁極とロータの回転磁極間の吸引力を強める部分にの
み設けたことを特徴とするモータ構造を提供する。本願
の請求項６に記載の発明は、請求項１に記載の発明に加
えて、前記極歯の巾を、均等に形成したことを特徴とす
るモータ構造を提供する。 The invention according to claim 4 of the present application is based on claim 2.
In addition to the invention described in (1), there is provided a motor structure characterized in that the pole teeth are cut and raised from the rotation magnetic pole direction of the rotor in the rotation axis direction. The invention according to claim 5 of the present application
In addition to the invention according to claim 1, the pole teeth are fixed.
In the part that strengthens the attractive force between the child magnetic pole and the rotor's rotating magnetic pole,
A motor structure characterized by being provided only. Application
The invention according to claim 6 is an addition to the invention according to claim 1.
In addition, the width of the pole teeth is evenly formed.
To provide a motor structure.
【０００６】本願の請求項７に記載の発明は、請求項１
に記載の発明に加えて、前記極歯の巾を、不均一に形成
したことを特徴とするモータ構造を提供する。本願の請
求項８に記載の発明は、請求項１に記載の発明に加え
て、前記極歯の高さを、均等に形成したことを特徴とす
るモータ構造を提供する。本願の請求項９に記載の発明
は、請求項１に記載の発明に加えて、極歯の高さを、不
均一に形成したことを特徴とするモータ構造を提供す
る。 The invention according to claim 7 of the present application is the same as claim 1.
In addition to the invention described in, the width of the pole tooth is formed non-uniformly.
A motor structure characterized by the above is provided. Contract of this application
The invention described in claim 8 is in addition to the invention described in claim 1.
The height of the pole teeth is evenly formed.
To provide a motor structure. The invention according to claim 9 of the present application
In addition to the invention of claim 1, the height of the pole teeth is
To provide a motor structure characterized by being formed uniformly
It
【０００７】[0007]
【実施例】本発明の一実施例について、図面を用いて詳
細に説明する。図１は、プリント配線を施した電気配線
板１’を表面に施した軟磁性材でできたモータ取付基板
１にモータの固定子部分を取付け、この基板１にロータ
を回転自在に設けた状態を示す断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a state in which a stator portion of a motor is mounted on a motor mounting board 1 made of a soft magnetic material, the surface of which is an electric wiring board 1'with printed wiring, and a rotor is rotatably provided on the board 1. FIG.
【０００８】図１において、１はフロッピーディスク駆
動装置を構成する基板であり、鉄などの軟磁性体からな
りたっている。該基板１の中央部には、複数個の孔２が
穿たれ当該孔を取付部として合成樹脂製の固定基台３が
射出成形により固定されている。固定基台３の中央には
円筒状の軸受筒４が固定されている。該軸受筒４の底部
には、後にも述べる軸受の底面を支えるピボット５が設
けられている。７は回転子を構成するとともに、フロッ
ピーディスクを回転する回転円板であり、薄い円形の皿
状を呈している。回転円板７の外周８の内側にはリング
状の永久磁石からなる回転磁極９が固定されている。ま
た外周８の下部には、回転円板７の回転速度を検出する
速度検出用永久磁石１０が固定されている。前記永久磁
石からなる回転磁極９はリング状を呈している。回転磁
極９には着磁により複数個の磁極が形成されている。こ
れ等の磁極の極性は相隣なる同士反転している。なお回
転磁極９を含む回転円板７組立体はロータ６を構成す
る。In FIG. 1, reference numeral 1 is a substrate constituting a floppy disk drive, which is made of a soft magnetic material such as iron. A plurality of holes 2 are formed in the central portion of the substrate 1, and a fixed base 3 made of synthetic resin is fixed by injection molding with the holes as mounting portions. A cylindrical bearing tube 4 is fixed to the center of the fixed base 3. A pivot 5 for supporting the bottom surface of the bearing, which will be described later, is provided at the bottom of the bearing cylinder 4. Reference numeral 7 denotes a rotating disk which constitutes a rotor and rotates a floppy disk, and has a thin circular dish shape. A rotating magnetic pole 9 made of a ring-shaped permanent magnet is fixed inside the outer periphery 8 of the rotating disk 7. A speed detecting permanent magnet 10 for detecting the rotation speed of the rotating disk 7 is fixed to the lower portion of the outer circumference 8. The rotating magnetic pole 9 composed of the permanent magnet has a ring shape. A plurality of magnetic poles are formed on the rotating magnetic pole 9 by magnetization. The polarities of these magnetic poles are opposite to each other. The rotating disk 7 assembly including the rotating magnetic poles 9 constitutes the rotor 6.
【０００９】回転円板７の中心部には金属製の回転軸取
付板１１が固定されており、該回転軸取付板１１の中心
には回転軸１２が固定されている。回転軸１２は円筒状
の軸受筒４に回転自在に軸承されている。回転円板７に
は穴１３が明けられており、該穴１３からドライブピン
１４が突出している。該ドライブピン１４は図２に示す
ように、回転円板７にその一端を固定されているばね板
１５の他方端に固定されている。ばね板１５は、取付基
部１６とこれに続くアーム部１７とを有し、該アーム部
１７の先端にドライブピン１４が設けられている。図１
において２１は固定子磁極、２２は固定子巻線である。
該固定子磁極２１は固定基台３から突出している突起２
３のかしめ付けにより基板１に固定されている。図には
示されていないが、回転円板７の表面には回転軸１２を
中心として薄いシート状の吸引磁石が設けられており、
この吸引磁石は、回転駆動されるフロッピーディスク中
央に設けられた軟鉄板を吸引して、これを回転円板７に
固定させる。図１及び図２において２５は固定基台３に
設けられた端子である。A metal rotary shaft mounting plate 11 is fixed to the center of the rotary disk 7, and a rotary shaft 12 is fixed to the center of the rotary shaft mounting plate 11. The rotating shaft 12 is rotatably supported by the cylindrical bearing tube 4. A hole 13 is formed in the rotary disc 7, and a drive pin 14 projects from the hole 13. The drive pin 14 is fixed to the other end of a spring plate 15 whose one end is fixed to the rotary disc 7, as shown in FIG. The spring plate 15 has an attachment base portion 16 and an arm portion 17 following the attachment base portion 16, and the drive pin 14 is provided at the tip of the arm portion 17. Figure 1
Reference numeral 21 is a stator magnetic pole, and 22 is a stator winding.
The stator magnetic pole 21 is a protrusion 2 protruding from the fixed base 3.
It is fixed to the substrate 1 by crimping 3. Although not shown in the drawing, a thin sheet-shaped attraction magnet is provided on the surface of the rotating disk 7 about the rotating shaft 12,
This attracting magnet attracts a soft iron plate provided in the center of the rotationally driven floppy disk and fixes it to the rotating disk 7. In FIG. 1 and FIG. 2, 25 is a terminal provided on the fixed base 3.
【００１０】図には示されていないが固定子巻線２２か
ら引出された導線は端子２５に巻き付けられこの端子は
前記電気配線板１’の表面に形成されたプリント配線と
接続されている。１８は該基板１’上に設けられた３相
ブラシレスＤＣモータを駆動する為の駆動ＩＣであり、
速度サーボコントローラも内蔵されている。Although not shown in the figure, a lead wire drawn from the stator winding 22 is wound around a terminal 25, and this terminal is connected to a printed wiring formed on the surface of the electric wiring board 1 '. Reference numeral 18 is a drive IC for driving a three-phase brushless DC motor provided on the substrate 1 ′,
A speed servo controller is also built-in.
【００１１】さて、図１、２を用いた今までの説明では
触れなかった本発明の特徴的な部分について説明する。
極歯３７がその部分であり、これは軟磁性材でできたモ
ータ取付板１の一部を切り起こして（１の上面にある電
気配線板１’には干渉する部分に穴を明けて）円周方向
には固定子磁極２１の先端の固定子磁極歯３８の中間近
傍で、径方向には該固定子磁極歯３８程度でエアギャッ
プ中の磁束（密度）及び該分布を効果的に調整できる場
所に突出させることがポイントである。Now, a characteristic part of the present invention, which has not been mentioned in the above description using FIGS. 1 and 2, will be described.
The pole tooth 37 is that part, and this is a part of the motor mounting plate 1 made of a soft magnetic material cut and raised (the electric wiring board 1 ′ on the upper surface of 1 has a hole in the part that interferes). The magnetic flux (density) and the distribution in the air gap are effectively adjusted in the circumferential direction in the vicinity of the middle of the stator magnetic pole teeth 38 at the tip of the stator magnetic pole 21 and in the radial direction about the stator magnetic pole teeth 38. The point is to make it stick out where it can.
【００１２】図３にその詳細を説明する。図３は回転円
板７を取りはずし、かつ軸受筒４及び固定子巻線２２が
ない状態での斜視図である。固定子磁極２１のスロット
毎にモータ取付用の基板１を切り起こした、エアギャッ
プ（図示せず）と対向する部分に突出させている状態を
示している。The details will be described with reference to FIG. FIG. 3 is a perspective view in a state in which the rotating disk 7 is removed and the bearing cylinder 4 and the stator winding 22 are not provided. It shows a state in which the motor mounting substrate 1 is cut and raised for each slot of the stator magnetic pole 21 and is projected to a portion facing an air gap (not shown).
【００１３】この極歯３７により、エアギャップ中の固
定子鉄心の量が変わりエアギャップ中の磁束（密度）及
びその分布が変わることは容易に推定が付く、特に補極
によりこれらを調整している固定子構成においてはこの
補極をなくして当該極歯３７にその代用をさせることも
でき、結果として補極により固定子巻線作業がしずらい
点、並びに巻線占積率が低下する点が改善できるメリッ
トがある。又、当然のことながら極歯３７の位置、面積
（形状）及びエアギャップに対する曲率を調整すること
により、コギングトルク／トルクリップルを改善するこ
とができる。It can be easily estimated that the pole teeth 37 change the amount of the stator core in the air gap and change the magnetic flux (density) and its distribution in the air gap. In the present stator configuration, this pole can be eliminated and the pole tooth 37 can be used as a substitute. As a result, the stator winding work is difficult due to the pole and the winding space factor is reduced. There is a merit that the points can be improved. Further, as a matter of course, the cogging torque / torque ripple can be improved by adjusting the position, the area (shape) of the pole teeth 37 and the curvature with respect to the air gap.
【００１４】図４は極歯３７を固定子磁極２１のスロッ
トに突出させることは図３と同様であるが、モータ取付
板１からの切りおこし方向が違う（図３ではスロット側
を切りおこしているが、図４ではギャップ側を切りおこ
ししている点が異なる）場合を示し、かつ電気配線板
１’の穴の大きさが違う（図３では極歯３７の切りおこ
し部全体であり、図４では極歯３７の先端部のみが出る
大きさの穴を示す）例を示している。図では、固定子巻
線２２は集中巻きのものを示しているが重ね巻の巻線に
も使用可能である。FIG. 4 is similar to FIG. 3 in that the pole teeth 37 are projected into the slots of the stator magnetic pole 21, but the cutting and raising direction from the motor mounting plate 1 is different (in FIG. 3, the slot side is cut and raised. However, FIG. 4 shows a case where the gap side is cut and raised, and the size of the hole of the electric wiring board 1 ′ is different (in FIG. 3, it is the whole cut and raised portion of the pole tooth 37, FIG. 4 shows an example of a hole having a size such that only the tips of the pole teeth 37 are exposed. In the figure, the stator winding 22 is shown as a concentrated winding, but it can also be used for lap winding.
【００１５】次に本発明の極歯３７とアキシャル方向の
磁気的バランスについて図５により述べる。なお、図６
は従来品の回転磁極９と固定磁極２１並びに固定子磁極
歯３８のモータ取付用の基板１に対して軸方向の位置関
係を示した図である。図５の（ｂ）に示すように、固定
子磁極歯３８間に極歯３７を設けない場合、エアギャッ
プ面での回転磁極９の軸方向の磁気的中心点Ａ（基板１
からの距離をａとする）と固定子磁極歯３８の軸方向の
磁気抵抗（１／パーミアンス）の中心点Ｂ（基板１から
の距離をｂとする）とすればａ＞ｂとなり結果としてパ
ーミアンスを上げようとしてロータ６は磁気的吸引力に
より常時基板１側に吸引される（実際には図５では図示
していないが回転軸１２がピボット５を押している）力
が働くことがわかる。実際にはこの力の他に速度検出用
永久磁石１０と基板１との磁気的吸引力により更に大き
なものとなっている。Next, the magnetic balance between the pole teeth 37 and the axial direction of the present invention will be described with reference to FIG. Note that FIG.
FIG. 6 is a diagram showing the positional relationship in the axial direction of the conventional rotary magnetic pole 9, the fixed magnetic pole 21, and the stator magnetic pole teeth 38 with respect to the motor mounting substrate 1. As shown in FIG. 5B, when the pole teeth 37 are not provided between the stator magnetic pole teeth 38, the magnetic center point A in the axial direction of the rotary magnetic pole 9 on the air gap surface (the substrate 1
A) and the center point B of the magnetic resistance (1 / permeance) in the axial direction of the stator magnetic pole teeth 38 (the distance from the substrate 1 is b), a> b, resulting in permeance. It can be seen that the rotor 6 is always attracted to the substrate 1 side by a magnetic attraction force (actually, although not shown in FIG. 5, the rotating shaft 12 pushes the pivot 5), in order to raise the force. In fact, in addition to this force, the magnetic attraction force between the speed detecting permanent magnet 10 and the substrate 1 increases the force.
【００１６】一方、図５の（ａ）は、固定子磁極歯３８
間に極歯３７を設けた場合を示しており、この場合には
回転磁極９の軸方向の磁気的中心点Ａは図５の（ｂ）と
変わらないが、固定子磁極歯３８の軸方向の磁気的中心
は極歯３７が設けられたことによりこの分基板１（下
側）側に移動したＢ’点（基板１からの距離をｂ’とす
る）に下がりａ＞ｂ’（但しｂ＞ｂ’）となり図５の
（ｂ）よりも更に大きな磁気的吸引力がロータ６と基板
１との間に作用し、回転軸１２がピボット５を押しつけ
る様子が理解できる。On the other hand, FIG. 5A shows the stator magnetic pole teeth 38.
It shows a case where pole teeth 37 are provided between them. In this case, the magnetic center point A in the axial direction of the rotating magnetic pole 9 is the same as that in FIG. 5B, but the axial direction of the stator magnetic pole teeth 38 is shown. The magnetic center of is lowered to the point B '(distance from the substrate 1 is b') moved to the side of the substrate 1 (lower side) due to the provision of the pole teeth 37, and a> b '(however, b > B ′) and a magnetic attraction force larger than that in FIG. 5B acts between the rotor 6 and the substrate 1 and the rotating shaft 12 presses the pivot 5.
【００１７】この力は図１、２で示した摺動タイプの軸
受においてはロータ６を安定して回転させるために大変
重要な力となる。更にこの摺動タイプの軸受においては
なめらかに回転させる為に軸受筒４と回転軸１２の間に
必ずラジアル方向のギャップ（すき間；ガタ）が必要で
ありこのギャップによりロータ６のギャップを含めた面
ブレは増大する。このため一般的にはこのギャップをモ
ータ取付板１に対して一定方向（位置）に傾け、ギャッ
プ分による軸振れの増加を押えることが考えられてい
る。This force is very important for the stable rotation of the rotor 6 in the sliding type bearing shown in FIGS. Further, in this sliding type bearing, a radial gap (clearance; play) is always required between the bearing tube 4 and the rotary shaft 12 for smooth rotation, and the surface including the rotor 6 is included by this gap. Blur increases. Therefore, it is generally considered that the gap is tilted in a certain direction (position) with respect to the motor mounting plate 1 to suppress an increase in shaft runout due to the gap.
【００１８】本発明は極歯３７を部分的に間引くことに
よりコストをかけずに簡単にギャップをなくす（ロータ
６を基板１に対して傾きをもたせることにより、回転軸
１２を一定方向に傾ける）ことが出来る。図６に極歯３
７を部分的に間引いた状態の展開図を示す。図７は、モ
ータの回転軸を中心として切断した断面図を示す。図７
からわかるように、本発明においては極歯３７を設けた
方が、同極歯３７を設けない方よりも固定子磁極歯３８
とロータ６の回転磁極９との間の軸方向の吸引力が強く
なる。従って、ロータ６の回転軸１２は軸受筒４の中
で、Ｐ点，Ｑ点，Ｒ点の３点支持となる様に傾き方向が
決められ軸の安定した回転が得られる。According to the present invention, the pole teeth 37 are partially thinned to easily eliminate the gap without cost (the rotor 6 is tilted with respect to the substrate 1 so that the rotary shaft 12 is tilted in a certain direction). You can 6 pole teeth 3
7 is a development view in which 7 is partially thinned out. FIG. 7 shows a cross-sectional view cut along the rotation axis of the motor. Figure 7
As can be seen from the above, in the present invention, the pole teeth 37 are provided, and the stator pole teeth 38 are provided more than the pole teeth 37 are not provided.
The attraction force in the axial direction between the rotor and the rotating magnetic pole 9 of the rotor 6 becomes stronger. Therefore, the rotating shaft 12 of the rotor 6 is tilted so that the rotating shaft 12 of the rotor 6 is supported by the bearing cylinder 4 at three points P, Q, and R, so that stable rotation of the shaft can be obtained.
【００１９】上記実施例では、回転磁極９と固定子磁極
２１との軸方向の吸引力を弱める部分の極歯３７を間引
いたが、このような吸引力の調節は、極歯３７の幅、あ
るいは高さを変えても目的を達成できる。なお、図示し
て説明していないが軸受構造を、ボールベアリング＋摺
動軸受の複合型に形成した場合においても同様に、回転
軸の傾きを軸方向の吸引力により調整しロータを安定さ
せて回転させることができる。In the above embodiment, the pole teeth 37 of the portion for weakening the attraction force in the axial direction between the rotating magnetic pole 9 and the stator pole 21 are thinned out. Alternatively, the purpose can be achieved by changing the height. Although not illustrated and described, when the bearing structure is formed as a composite type of a ball bearing and a sliding bearing, similarly, the inclination of the rotating shaft is adjusted by the axial suction force to stabilize the rotor. It can be rotated.
【００２０】[0020]
【発明の効果】以上のことから本発明は、
１）コストをかけることなくコギングトルク／トルクリ
ップルの改善ができ、巻線型の補極により構成したもの
より巻線などの作業が容易であり、かつ巻線占積率を上
げることが出来、モータ特性の改善をはかることができ
る。
２）ラジアルギャップ方式の積層型モータにおいても必
要なアキシャル方向の磁気的吸引力を発生させることが
でき、摺動タイプの安価な軸受が使用できる。
３）コストをかけずに摺動軸を一定方向に傾むけ振れの
無い安定したモータを構成できる。
などの発明の効果を具備する。As described above, according to the present invention, 1) the cogging torque / torque ripple can be improved without increasing the cost, and the work of winding or the like is easier than that of the winding type auxiliary pole. In addition, the winding space factor can be increased and the motor characteristics can be improved. 2) Even in the radial gap type laminated motor, the required magnetic attraction force in the axial direction can be generated, and the sliding type inexpensive bearing can be used. 3) It is possible to construct a stable motor that tilts the sliding shaft in a certain direction and does not shake without cost. It has the effects of the invention.
【図１】図１は、ラジアルギャップ型モータの断面図で
ある。FIG. 1 is a sectional view of a radial gap type motor.
【図２】図２は、ラジアルギャップ型モータの平面図で
ある。FIG. 2 is a plan view of a radial gap type motor.
【図３】図３は、固定子磁極部分を示す部分斜視図であ
る。FIG. 3 is a partial perspective view showing a stator magnetic pole portion.
【図４】図４は、固定子磁極部分を示す他の実施例の部
分斜視図である。FIG. 4 is a partial perspective view of another embodiment showing a stator magnetic pole portion.
【図５】図５は、本発明の実施例の動作状態を説明する
部分断面図である。FIG. 5 is a partial cross-sectional view illustrating an operating state of the embodiment of the present invention.
【図６】図６は、本発明のモータの固定子磁極の展開図
である。FIG. 6 is a development view of a stator magnetic pole of the motor of the present invention.
【図７】図７は、本発明の実施例の動作状態を説明する
部分断面図である。FIG. 7 is a partial cross-sectional view illustrating an operating state of the embodiment of the present invention.
１・・・・・基板 １’・・・・電気配線板 ２・・・・・孔 ３・・・・・固定基台 ４・・・・・軸受筒 ５・・・・・ピボット ６・・・・・ロータ ７・・・・・回転円板 ８・・・・・外周 ９・・・・・回転磁極 １０・・・・・速度検出用永久磁石 １１・・・・・回転軸取付板 １２・・・・・回転軸 １３・・・・・穴 １４・・・・・ドライブピン １５・・・・・ばね板 １６・・・・・取付基部 １７・・・・・アーム部 １８・・・・・駆動ＩＣ ２１・・・・・固定子磁極 ２２・・・・・固定子巻線 ２３・・・・・突起 ２５・・・・・端子 ３７・・・・・極歯 ３８・・・・・固定子磁極歯 1 ... Board 1 '... Electric wiring board 2 ... hole 3 ... Fixed base 4 ... Bearing tube 5 ... Pivot 6 ... Rotor 7 ... Rotating disk 8: Outer circumference 9: Rotating magnetic pole 10: Permanent magnet for speed detection 11 ... Rotary shaft mounting plate 12 ... Rotary axis 13 ... hole 14-Drive pin 15 ... Spring plate 16 ... Mounting base 17: Arm part 18: Driving IC 21: Stator magnetic pole 22: Stator winding 23 ... Protrusion 25 ... Terminal 37 ... Polar teeth 38: Stator magnetic pole teeth
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平８−19196（ＪＰ，Ａ) 特開 昭62−89461（ＪＰ，Ａ) 特開 昭62−147941（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02K 21/22 H02K 1/10 H02K 29/00 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-19196 (JP, A) JP-A-62-89461 (JP, A) JP-A-62-147941 (JP, A) (58) Field (Int.Cl. 7 , DB name) H02K 21/22 H02K 1/10 H02K 29/00
Claims (9)
において、固定子磁極と固定子磁極との間であって、回
転磁極に近接してモータを取り付ける基板と接続した軟
磁性材で構成された極歯を円周方向に不均一に設け、前
記回転磁極の回転軸を一定方向に傾けたことを特徴とす
るモータ構造。1. A radial gap type motor provided on a substrate, comprising a soft magnetic material connected between a stator magnetic pole and a stator magnetic pole, and a substrate on which the motor is mounted in the vicinity of the rotating magnetic pole. the provided unevenly in the circumferential direction pole teeth, before
A motor structure in which the rotating shaft of the rotating magnetic pole is tilted in a certain direction .
軟磁性の金属板を切り起こして形成したものであること
を特徴とする請求項１に記載のモータ構造。2. The motor structure according to claim 1, wherein the pole teeth are formed by cutting and raising a soft magnetic metal plate which is a substrate on which the motor is mounted.
切り起こされていることを特徴とする請求項２に記載の
モータ構造。3. The motor structure according to claim 2, wherein the pole teeth are cut and raised in a radial direction from a rotation shaft.
軸方向に切り起こされていることを特徴とする請求項２
に記載のモータ構造。4. The pole teeth are cut and raised in a direction of a rotation axis from a direction of a rotation magnetic pole of a rotor.
The motor structure described in.
極間の吸引力を強める部分にのみ設けたことを特徴とす
る請求項１に記載のモータ構造。 Wherein said pole teeth, the motor structure according to claim 1, characterized in that provided only in a portion to enhance the attraction between the rotating magnetic poles of the stator pole and the rotor.
徴とする請求項１に記載のモータ構造。 6. A motor structure according to claim 1, characterized in that the width of the pole teeth were uniformly formed.
特徴とする請求項１に記載のモータ構造。 7. A motor structure according to claim 1, characterized in that the width of the pole teeth were unevenly formed.
特徴とする請求項１に記載のモータ構造。 8. A motor structure according to claim 1, characterized in that the height of the pole teeth were uniformly formed.
徴とする請求項１に記載のモータ構造。 9. The motor structure according to claim 1, wherein the height of the pole teeth is formed non-uniformly.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17008195A JP3458917B2 (en) | 1995-07-06 | 1995-07-06 | Motor structure |
| EP96305017A EP0752749A3 (en) | 1995-07-06 | 1996-07-04 | Motor structure |
| US08/675,836 US6013965A (en) | 1995-07-06 | 1996-07-05 | Motor structure |
| CN96111097.XA CN1046066C (en) | 1995-07-06 | 1996-07-06 | Motor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17008195A JP3458917B2 (en) | 1995-07-06 | 1995-07-06 | Motor structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0923625A JPH0923625A (en) | 1997-01-21 |
| JP3458917B2 true JP3458917B2 (en) | 2003-10-20 |
Family
ID=15898295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17008195A Expired - Fee Related JP3458917B2 (en) | 1995-07-06 | 1995-07-06 | Motor structure |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6013965A (en) |
| EP (1) | EP0752749A3 (en) |
| JP (1) | JP3458917B2 (en) |
| CN (1) | CN1046066C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3395071B2 (en) * | 1996-04-25 | 2003-04-07 | ミネベア株式会社 | Motor structure |
| DE59806285D1 (en) | 1997-07-24 | 2002-12-19 | Papst Motoren Gmbh & Co Kg | Claw pole |
| JP2002354768A (en) * | 2001-05-24 | 2002-12-06 | Sankyo Seiki Mfg Co Ltd | Motor |
| JP2003018773A (en) * | 2001-06-28 | 2003-01-17 | Sankyo Seiki Mfg Co Ltd | Motor with core |
| JP2003059254A (en) * | 2001-08-22 | 2003-02-28 | Mitsumi Electric Co Ltd | Flexible disk drive |
| GB2379334B (en) * | 2001-08-29 | 2005-10-19 | Sunonwealth Electr Mach Ind Co | Stator with a radial winding |
| JP2003134770A (en) * | 2001-10-23 | 2003-05-09 | Mitsumi Electric Co Ltd | Flexible disk drive |
| CN100426625C (en) * | 2005-01-31 | 2008-10-15 | 台达电子工业股份有限公司 | Stator structure of motor |
| JP2006223062A (en) * | 2005-02-10 | 2006-08-24 | Nippon Densan Corp | Motor and recording disc drive device |
| TWI306323B (en) * | 2005-02-14 | 2009-02-11 | Sunonwealth Electr Mach Ind Co | Motor structure |
| CN100399681C (en) * | 2005-03-07 | 2008-07-02 | 启原智财科技股份有限公司 | Motor with magnetic induction balance sheet |
| CN101741203B (en) * | 2008-11-07 | 2011-08-31 | 北京中纺锐力机电有限公司 | Switched reluctance motor with good positioning performance |
| JP5478136B2 (en) * | 2009-07-15 | 2014-04-23 | 三菱電機株式会社 | Permanent magnet synchronous motor |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1396305A (en) * | 1971-05-06 | 1975-06-04 | Sangamo Weston | Ac synchronous motors |
| US4166226A (en) * | 1976-10-14 | 1979-08-28 | V-M Corporation | No-back synchronous motor drive |
| US4394595A (en) * | 1978-12-04 | 1983-07-19 | Emhart Industries, Inc. | Stator arrangement for a synchronous motor |
| JPS6289461A (en) * | 1985-10-14 | 1987-04-23 | Matsushita Electric Ind Co Ltd | brushless motor |
| JPS62147941A (en) * | 1985-12-20 | 1987-07-01 | Matsushita Electric Ind Co Ltd | brushless motor |
| US5331245A (en) * | 1986-01-13 | 1994-07-19 | Papst Licensing Gmbh | Permanent magnet excited electric motor with improved torque ripple |
| DE3608472C2 (en) * | 1986-03-14 | 1994-04-07 | Bosch Gmbh Robert | Method for noise reduction in an electrical machine and electrical machine produced by this method, in particular three-phase generator for vehicles |
| US4975607A (en) * | 1988-07-11 | 1990-12-04 | Kabushiki Kaisha Sankyo Seiki Seisakusho | Frequency generator with superimposed generation coil |
| JPH0729731Y2 (en) * | 1988-12-27 | 1995-07-05 | 株式会社三協精機製作所 | Rotating electric machine |
| JP2796333B2 (en) * | 1989-02-22 | 1998-09-10 | 株式会社日立製作所 | Motor structure and magnetic disk drive using the same |
| US5107159A (en) * | 1989-09-01 | 1992-04-21 | Applied Motion Products, Inc. | Brushless DC motor assembly with asymmetrical poles |
| JP2888142B2 (en) * | 1993-11-08 | 1999-05-10 | 三菱電機株式会社 | Rotary motor and method of manufacturing the same |
| US5406158A (en) * | 1993-07-23 | 1995-04-11 | Eaton Corporation | Miniature synchronous motor |
-
1995
- 1995-07-06 JP JP17008195A patent/JP3458917B2/en not_active Expired - Fee Related
-
1996
- 1996-07-04 EP EP96305017A patent/EP0752749A3/en not_active Withdrawn
- 1996-07-05 US US08/675,836 patent/US6013965A/en not_active Expired - Fee Related
- 1996-07-06 CN CN96111097.XA patent/CN1046066C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1046066C (en) | 1999-10-27 |
| US6013965A (en) | 2000-01-11 |
| CN1146091A (en) | 1997-03-26 |
| JPH0923625A (en) | 1997-01-21 |
| EP0752749A3 (en) | 1998-01-07 |
| EP0752749A2 (en) | 1997-01-08 |
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